A sundial is a device that tells the time of day when there is sunlight by the apparent position of the Sun in the sky. It consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial. As the Sun appears to move across the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day. The gnomon casts a broad shadow; the shadow of the style shows the time. This tool is marked for latitude 35-degree, Dimension: 23*25cm.